An item is orignally priced $68.89.it is kn sale for 42 percent of the original price. which is an estimate of the sale price a: 2.00 b: $3.50 c: $20 d: $28

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Having a hard time understanding this question (see attachment).

Which of the following parabolas opens up?